Short answer: the two best budget (low‑cost) options for flying from Kuwait (KWI) to Dubai (DXB) are flydubai and Jazeera Airways — both operate frequent direct services, short ~1h40–1h55 flights, and regularly offer very low one‑way fares. (flydubai.com)

More detail and quick tips

• flydubai — strong choice

  • Operates many daily non‑stop flights KWI↔DXB, often with very low one‑way fares (example listing shows one‑way fares from about KWD 24). Flight time about 1h40–1h45. Good schedule frequency and easy online add‑ons (seat/baggage/meal). (flydubai.com)

• Jazeera Airways — excellent budget option from Kuwait

  • Kuwait’s Jazeera runs regular direct flights to Dubai (typical schedules shown around 07:25 KWI → DXB and return services). Short non‑stop timing (~1h40–1h55); competitive fares and simple fare bundles. Good if you prefer a Kuwait‑based LCC. (info.flightmapper.net)

• Other low‑cost carriers

  • Air Arabia (Sharjah base) and other regional LCCs occasionally run promotions and may provide connecting options to Dubai-area airports (often Sharjah, not DXB). These can be cheap but may be indirect or serve Sharjah (SHJ) rather than DXB. If you must arrive specifically at Dubai International (DXB), check whether the fare is to DXB or to SHJ. (timesofindia.indiatimes.com)

Practical tips when choosing a budget carrier

• Check total price (fare + carry/checked baggage + seat selection + airport/seat fees). Low headline fares often exclude hold baggage.
• If you need to arrive at DXB (not Sharjah), verify airport code (DXB vs SHJ). Transfer time/cost from Sharjah to Dubai can erase any fare savings.
• Book in advance or watch airline sales; weekday mid‑week flights are often cheapest.
• Compare schedules — for short regional hops frequency and departure time may be more important than a few KWD in savings.
• Sign up for the airlines’ mailing lists or fare alerts (flydubai, Jazeera) for flash sales. (flydubai.com)

If you want, I can:

• Compare current fares and schedules for your travel dates, or
• Check whether Air Arabia or other carriers have direct/cheap connections on the days you plan to travel.

Which would you prefer — I can look up specific dates and prices now.